Help on simulating a circuit - First attempt didn't work

The assignment for me is to simulate a circuit. I've already selected a project and I have already gathered parts thanks to my parents, but I need help on simulating the circuit. My first attempt did not go so well. The final steps of the project is to build the project on a breadboard, which I can do with my dad, and build it on a perf board, which I can do with my dad as well.

I just need to build the circuit, there really is no relevant equations as this is a project for assembling a circuit, not some help on homework or studying for a test.

3. The attempt at a solution

Here's my first attempt at doing the circuit:

http://l.bitcasa.com/C4FVbXxJ [Broken]

It did not work out so well because it did not become animated, like it was supposed to have simulated electricity flowing through it.

May you please help me on my second attempt to simulate the circuit. I believe the root of my problem is not understanding where what specific wires were supposed to go inside the IC1 555 Timer. I need to simulate the circuit by the end of this weekend.

Staff: Mentor

The assignment for me is to simulate a circuit. I've already selected a project and I have already gathered parts thanks to my parents, but I need help on simulating the circuit. My first attempt did not go so well. The final steps of the project is to build the project on a breadboard, which I can do with my dad, and build it on a perf board, which I can do with my dad as well.

I just need to build the circuit, there really is no relevant equations as this is a project for assembling a circuit, not some help on homework or studying for a test.

3. The attempt at a solution

Here's my first attempt at doing the circuit:

http://l.bitcasa.com/C4FVbXxJ [Broken]

It did not work out so well because it did not become animated, like it was supposed to have simulated electricity flowing through it.

May you please help me on my second attempt to simulate the circuit. I believe the root of my problem is not understanding where what specific wires were supposed to go inside the IC1 555 Timer. I need to simulate the circuit by the end of this weekend.

Why did you re-draw the circuit in such a strange arrangement? In addition to being very hard to read, it looks like you have mis-connected several things, including the power supply connection for the IC.

I'd recommend that you draw the circuit in the simulation software exactly as it is shown in the example schematic.

The simulation software only had an IC 555 timer that had 7 outputs, and they weren't even numbered, whereas the example schematic had 8 outputs and were numbers. Can you recommend me a circuit simulation software that can do just that? Why 7 and not 8? Why the strange th, tr, ctl, labels? Why couldn't they be numbered to make it easier for me?

Staff: Mentor

The simulation software only had an IC 555 timer that had 7 outputs, and they weren't even numbered, whereas the example schematic had 8 outputs and were numbers. Can you recommend me a circuit simulation software that can do just that? Why 7 and not 8? Why the strange th, tr, ctl, labels? Why couldn't they be numbered to make it easier for me?

There are many circuit simulators online. Falstad's seems too "experimental" to what you need.
LTSpice, as suggested should do just fine.
You could teach yourself a bit about it first. Check out some YouTube tutorials for it.
Maybe this link can help you:http://forum.allaboutcircuits.com/showpost.php?p=526887&postcount=2
You may need to download some models to build what you want. LTSpice is not so fully-featured from start.

WARNING: Less than two connections to node NC_01. This node is used by V1.
WARNING: Less than two connections to node NC_06. This node is used by R3.
WARNING: Less than two connections to node NC_07. This node is used by R2.
WARNING: Less than two connections to node NC_08. This node is used by R1.
Direct Newton iteration for .op point succeeded.
Singular matrix: Check node nc_02
Iteration No. 2
Fatal Error: Singular matrix: check node nc_02
Iteration No. 2